Backplane connector

ABSTRACT

A backplane connector includes a number of wafers and a spacer for assembling the number of wafers together. Each wafer includes an insulating frame. The insulating frame includes a first protrusion. The spacer includes a body portion. The body portion has a number of slots for holding the first protrusions of the wafers. A periphery of each slot is surrounded by the body portion. Compared with the prior art, the spacer of the present disclosure is provided with a number of slots for holding the first protrusions of the wafers. As a result, the wafers can be easily assembled and fixed as a whole.

CROSS-REFERENCE TO RELATED APPLICATIONS

This patent application claims priority of a Chinese Patent ApplicationNo. 202010567796.4, filed on Jun. 19, 2020 and titled “BACKPLANECONNECTOR ASSEMBLY”, and a Chinese Patent Application No.202021461673.4, filed on Jul. 22, 2020 and titled “BACKPLANE CONNECTOR”,the entire content of which is incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a backplane connector which belongs toa technical field of connectors.

BACKGROUND

Existing backplane connectors usually include an insulating housing anda plurality of wafers assembled to the insulating housing. Each waferincludes an insulating frame, a plurality of conductive terminalsinsert-molded with the insulating frame, and a metal shield mounted toat least one side of the insulating frame. The conductive terminalsusually include multiple pairs of differential signal terminals, a firstground terminal located on one side of each pair of differential signalterminals, and a second ground terminal located on the other side ofeach pair of differential signal terminals. The first ground terminal,the second ground terminal and the metal shield provide shielding forthe differential signal terminals in order to reduce signal crosstalkand improve the quality of signal transmission.

However, how to assemble multiple wafers into a whole so as tofacilitate assembly and fixation is a technical problem that needs to besolved by those skilled in the art.

SUMMARY

An object of the present disclosure is to provide a backplane connectorwith a plurality of wafers easily to be assembled.

In order to achieve the above object, the present disclosure adopts thefollowing technical solution: a backplane connector, comprising: aplurality of wafers, each wafer comprising an insulating frame and aplurality of conductive terminals fixed to the insulating frame; and aspacer assembling the plurality of wafers; wherein the insulating framecomprises a first protrusion; and wherein the spacer comprises a bodyportion, and the body portion defines a plurality of slots each of whichis adapted to fix corresponding first protrusion.

Compared with the prior art, the spacer of the present disclosure isprovided with a plurality of slots for holding the first protrusions ofthe wafers. As a result, the wafers can be easily assembled and fixed asa whole.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a backplane connector assembly inaccordance with an embodiment of the disclosure;

FIG. 2 is a partial perspective exploded view of FIG. 1;

FIG. 3 is a further perspective exploded view of FIG. 2;

FIG. 4 is a perspective schematic view of a first backplane connector ofthe present disclosure when it is mounted to a first circuit board;

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a partial perspective exploded view of a wafer of the firstbackplane connector;

FIG. 7 is a partially exploded perspective view of FIG. 6 from anotherangle;

FIG. 8 is a side view of the insulating frame when separated from theconductive terminals;

FIG. 9 is a side view of the first metal shield of the first backplaneconnector;

FIG. 10 is a side view of the second metal shield of the first backplaneconnector;

FIG. 11 is a schematic cross-sectional view taken along the line A′-A′in FIG. 2;

FIG. 12 is a partial enlarged view of a frame part C in FIG. 11;

FIG. 13 is a schematic cross-sectional view taken along line B′-B′ inFIG. 2;

FIG. 14 is a partial enlarged view of a frame part D in FIG. 13;

FIG. 15 is a partial perspective exploded view of the second backplaneconnector, in which a spacer is separated;

FIG. 16 is a top view of the spacer in FIG. 15;

FIG. 17 is a partial perspective exploded view of the second backplaneconnector, in which a mounting block is separated;

FIG. 18 is a partial enlarged view of a circled part F in FIG. 17;

FIG. 19 is a partially exploded perspective view of a wafer of thesecond backplane connector;

FIG. 20 is a perspective exploded view of an insulating block and ametal shell;

FIG. 21 is a partial enlarged view of a circled part Gin FIG. 19;

FIG. 22 is a partial enlarged view of a circled part H in FIG. 19;

FIG. 23 is a partially exploded perspective view of FIG. 19 from anotherangle;

FIG. 24 is a side view of a first metal shield of the second backplaneconnector;

FIG. 25 is a side view of a second metal shield of the second backplaneconnector;

FIG. 26 is a plan view of a wafer of the second backplane connector withan insulating block and a metal shell separated therefrom;

FIG. 27 is a partial perspective cross-sectional view taken along lineC′-C′ in FIG. 2;

FIG. 28 is a partial enlarged view of a frame part I in FIG. 27;

FIG. 29 is a partial perspective exploded view of the second backplaneconnector, in which a spacer is separated; and

FIG. 30 is a top view of the spacer in FIG. 29.

DETAILED DESCRIPTION

Exemplary embodiments will be described in detail here, examples ofwhich are shown in drawings. When referring to the drawings below,unless otherwise indicated, same numerals in different drawingsrepresent the same or similar elements. The examples described in thefollowing exemplary embodiments do not represent all embodimentsconsistent with this application. Rather, they are merely examples ofdevices and methods consistent with some aspects of the application asdetailed in the appended claims.

The terminology used in this application is only for the purpose ofdescribing particular embodiments, and is not intended to limit thisapplication. The singular forms “a”, “said”, and “the” used in thisapplication and the appended claims are also intended to include pluralforms unless the context clearly indicates other meanings.

It should be understood that the terms “first”, “second” and similarwords used in the specification and claims of this application do notrepresent any order, quantity or importance, but are only used todistinguish different components. Similarly, “an” or “a” and othersimilar words do not mean a quantity limit, but mean that there is atleast one; “multiple” or “a plurality of” means two or more than two.Unless otherwise noted, “front”, “rear”, “lower” and/or “upper” andsimilar words are for ease of description only and are not limited toone location or one spatial orientation. Similar words such as “include”or “comprise” mean that elements or objects appear before “include” or“comprise” cover elements or objects listed after “include” or“comprise” and their equivalents, and do not exclude other elements orobjects. The term “a plurality of” mentioned in the present disclosureincludes two or more.

Hereinafter, some embodiments of the present disclosure will bedescribed in detail with reference to the accompanying drawings. In thecase of no conflict, the following embodiments and features in theembodiments can be combined with each other.

Referring to FIGS. 1 and 2, an embodiment of the present disclosurediscloses a backplane connector assembly which includes a firstbackplane connector 100, a second backplane connector 200 for matingwith the first backplane connector 100, a first circuit board 301mounted with the first backplane connector 100, and a second circuitboard 302 mounted with the second backplane connector 200. In theillustrated embodiment of the present disclosure, the first backplaneconnector 100 and the second backplane connector 200 are mated in anorthogonal manner. The first circuit board 301 is perpendicular to thesecond circuit board 302.

Referring to FIGS. 3 and 4, the first backplane connector 100 includes aheader 1, a plurality of wafers 2 assembled to the header 1, a spacer 3fixed at a rear end of the plurality of wafers 2, and a mounting block 4mounted at a bottom end of the plurality of wafers 2.

Referring to FIGS. 5 to 8, the wafer 2 includes an insulating frame 21,a plurality of conductive terminals 22 fixed to the insulating frame 21,a first metal shield 23 fixed on one side of the insulating frame 21,and a second metal shield 24 fixed on the other side of the insulatingframe 21.

Referring to FIG. 8, each insulating frame 21 is roughly frame-shapedand includes a rear wall 211, a front wall 212 opposite to the rear wall211, a top wall 213 connecting one end of the rear wall 211 and one endof the front wall 212, a bottom wall 214 connecting the other end of therear wall 211 and the other end of the front wall 212, and a pluralityof connecting walls 215. The connecting walls 215 are capable ofenhancing the structural strength of the frame. The rear wall 211includes a first protrusion 2111 and a second protrusion 2112 whichprotrude rearwardly. The first protrusion 2111 and the second protrusion2112 are spaced apart from each other along the vertical direction. Thefirst protrusion 2111 and the second protrusion 2112 are in alignmentwith each other along the vertical direction. The first protrusion 2111includes a first constriction portion 2113, and the second protrusion2112 includes a second constriction portion 2114. In the illustratedembodiment of the present disclosure, the insulating frame 21 includes ahollow portion 210. The connecting walls 215 include a first connectingwall 2151 connecting the top wall 213 and the bottom wall 214, and asecond connecting wall 2152 connecting the rear wall 211 and the bottomwall 214. The first connecting wall 2151 and the second connecting wall2152 are exposed in the hollow portion 210. The top wall 213 includes afirst locking protrusion 2131 for being inserted into the first lockinggroove 122. The bottom wall 214 includes a second locking protrusion2141 for being inserted into the second locking groove 132.

Referring to FIGS. 6 to 8, the insulating frame 21 further includes aplurality of posts 216 for fixing the first metal shield 23 and thesecond metal shield 24. In the illustrated embodiment of the presentdisclosure, the posts 216 are disposed on the bottom wall 214, the firstconnecting wall 2151, the second connecting wall 2152 and the front wall212. The first metal shield 23 and the second metal shield 24 arelocated on opposite sides of the insulating frame 21, respectively. Theposts 216 include a plurality of first posts 2161 and a plurality ofsecond posts 2162. The first posts 2161 and the second posts 2162 arelocated on opposite sides of the insulating frame 21, respectively, soas to be fixed and positioned with the first metal shield 23 and thesecond metal shield 24.

Referring to FIG. 8, each conductive terminal 22 includes a contactportion 221, a tail portion 222 and a connection portion 223 connectingthe contact portion 221 and the tail portion 222. Some of the contactportions 221 are used to electrically connect with the second backplaneconnector 200. The tail portions 222 are used for being mounted to thefirst circuit board 301. In the illustrated embodiment of the presentdisclosure, the contact portion 221 is substantially perpendicular tothe tail portion 222. The connection portion 223 is of a curvedconfiguration.

Each group of conductive terminals 22 include a plurality of firstground terminals G1, a plurality of second ground terminals G2, and aplurality of signal terminals S1. In the illustrated embodiment of thepresent disclosure, two adjacent signal terminals S1 form a pair ofdifferential signal terminals. Each pair of differential signalterminals are located between one first ground terminal G1 and onesecond ground terminal G2. That is, each group of conductive terminals22 are arranged in a manner of G1-S1-S1-G2, which is beneficial toimprove the quality of signal transmission. The differential signalterminals are narrow-side coupling or wide-side coupling. A width of thefirst ground terminal G1 and a width the second ground terminal G2 aregreater than a width of each signal terminal S1 which is located betweenthe first ground terminal G1 and the second ground terminal G2.Therefore, it is beneficial to increase the shielding area and improvethe shielding effect.

In the illustrated embodiment of the present disclosure, the connectionportions 223 of the conductive terminals 22 are partially insert-moldedwith the insulating frame 21. Each connection portion 223 of the signalterminal S1 has a narrowed portion 2230 insert-molded with theinsulating frame 21 so as to adjust the impedance of the signal terminalS1 for achieving impedance matching. In the illustrated embodiment ofthe present disclosure, the contact portion 221 of the signal terminalS1 is substantially needle-shaped. The contact portion 221 of the firstground terminal G1 and the contact portion 221 of the second groundterminal G2 are substantially rectangular-shaped. The contact portion221 of the signal terminal S1 and the connection portion 223 of theconductive terminal 22 are both coplanar, which means they are locatedin a same first plane (for example, a horizontal plane). It should benoted that the technical term “coplanar” used in the present disclosureis intended to indicate that related components are substantially flush,which includes situations of incomplete coplanarity caused bymanufacturing tolerances. In the illustrated embodiment of the presentdisclosure, the first ground terminal G1 includes a first torsionportion 2241 connecting its contact portion 221 and its tail portion222, so that the contact portion 221 of the first ground terminal G1 islocated in a second plane (for example, a vertical plane) perpendicularto the first plane. The second ground terminal G2 includes a secondtorsion portion 2242 connecting its contact portion 221 and its tailportion 222, so that the contact portion 221 of the second groundterminal G2 is also located in the second plane (for example, thevertical plane) perpendicular to the first plane. The contact portion221 of the first ground terminal G1 and the contact portion 221 of thesecond ground terminal G2 are parallel to each other. Each connectionportion 223 of the first ground terminals G1 and the second groundterminals G2 further includes a slot 2231 adjacent to its correspondingtail portion 222. The slot 2231 extend through a bottom edge of theconnection portion 223, so that the connection portions 223 is dividedinto a first end portion 2232 and a second end portion 2233.

In the illustrated embodiment of the present disclosure, the first metalshield 23 and the second metal shield 24 are symmetrically disposed onopposite sides of the insulating frame 21. Referring to FIG. 9, thefirst metal shield 23 includes a first main body portion 231 and a firstextension portion 232 extending from the first main body portion 231.The first main body portion 231 is located on one side of the connectionportions 223 of the conductive terminals 22. The first extension portion232 is located on one side of the contact portions 221 of the conductiveterminals 22. In the illustrated embodiment of the present disclosure,the first extension portion 232 and the first main body portion 231 arelocated in different planes, in which the first extension portion 232 isfarther away from the second metal shield 24 than the first main bodyportion 231. The first main body portion 231 includes a plurality offirst mounting holes 2311 for mating with the plurality of first posts2161. The first posts 2161 are fixed and positioned in the firstmounting holes 2311 by soldering, thereby the fixing and positioning ofthe first metal shield 23 and the insulating frame 21 are realized. Thefirst main body portion 231 includes a plurality of ribs 233. The ribs233 include a plurality of first ribs 2331 protruding toward the firstground terminals G1 and a plurality of second ribs 2332 protrudingtoward the second ground terminals G2. The first ribs 2331 correspondingto the first ground terminal G1 are disposed along an extendingdirection of the connection portion 223 of the first ground terminal G1.The second ribs 2332 corresponding to the second ground terminal G2 aredisposed along an extending direction of the connection portion 223 ofthe second ground terminal G2. In the illustrated embodiment of thepresent disclosure, the first ribs 2331 and the second ribs 2332 areformed by stamping the first main body portion 231. The first ribs 2331and the second ribs 2332 protrude toward the second metal shield 24. Thefirst ribs 2331 and the second ribs 2332 are discontinuously disposedalong the extending direction of the connection portion 223 of the firstground terminal G1 and the extending direction of the connection portion223 of the second ground terminal G2, respectively, so as to achievemulti-position contact. In order to improve the reliability of thecontact between the first metal shield 23 and the first ground terminalsG1 and the second ground terminals G2. In the illustrated embodiment ofthe present disclosure, referring to FIG. 12, a wall thickness of thefirst rib 2331, a wall thickness of the second rib 2332, and a wallthickness of a portion of the first main body portion 231 locatedbetween the first rib 2331 and the second rib 2332 are the same.

The first extension portion 232 includes a plurality of first bulges2321 protruding toward the corresponding contact portions 221 of thefirst ground terminals G1, a plurality of second bulges 2322 protrudingtoward the corresponding contact portions 221 of the second groundterminals G2, and a plurality of first elastic pieces 2323 each of whichis located between adjacent first bulge 2321 and second bulge 2322. Thefirst elastic pieces 2323 extend along directions toward the first mainbody portion 231. Each first elastic piece 2323 has an arc-shapedcontact portion 2324. In the illustrated embodiment of the presentdisclosure, the first extension portion 232 further includes two firstprotruding tabs 2325 located at opposite sides of each first elasticpiece 2323. The first protruding tabs 2325 and the first elastic pieces2323 extend along opposite directions. The first protruding tabs 2325protrude sidewardly to contact the adjacent wafer 2 so as to improve theshielding effect. In the illustrated embodiment of the presentdisclosure, referring to FIG. 14, a wall thickness of the first bulge2321, a wall thickness of the second bulge 2322 and a wall thickness ofa portion of the first extension portion 232 located between the firstbulge 2321 and the second bulge 2322 are the same.

In addition, the first main body portion 231 further includes aplurality of first protruding pieces 2312 extending downwardly from abottom edge thereof and a plurality of connecting pieces 2313 each ofwhich is located between two adjacent first protruding pieces 2312. Byproviding the first protruding pieces 2312, the shielding length can beextended, and the shielding effect of the signal terminals S1 can beimproved. In the illustrated embodiment of the present disclosure, theconnecting pieces 2313 are stamped from the first main body portion 231.Each connecting piece 2313 straddles the corresponding slot 2231 toconnect one side of the first end portion 2232 and the second endportion 2233 of the same first ground terminal G1, thereby improving theshielding effect. At the same time, each connecting piece 2313 can alsoconnect one side of the first end portion 2232 and the second endportion 2233 of the same second ground terminal G2, thereby improvingthe shielding effect.

Similarly, referring to FIG. 10, the second metal shield 24 includes asecond main body portion 241 and a second extension portion 242extending from the second main body portion 241. The second main bodyportion 241 is located on the other side of the connection portions 223of the conductive terminals 22. The second extension portion 242 islocated on the other side of the contact portions 221 of the conductiveterminals 22. In the illustrated embodiment of the present disclosure,the second extension portion 242 and the second main body portion 241are located in different planes, in which the second extension portion242 is farther away from the first metal shield 23 than the second mainbody portion 241. The second main body portion 241 includes a pluralityof second mounting holes 2411 for mating with the plurality of secondposts 2162. The second posts 2162 are fixed and positioned in the secondmounting holes 2411 by soldering, so as to realize the fixing andpositioning of the second metal shield 24 and the insulating frame 21.The second main body portion 241 includes a plurality of ribs 243. Theribs 243 include a plurality of third ribs 2431 protruding toward thefirst ground terminals G1 and a plurality of fourth ribs 2432 protrudingtoward the second ground terminals G2. The third ribs 2431 are disposedalong the extending direction of the connection portion 223 of the firstground terminal G1. The fourth ribs 2432 are disposed along theextending direction of the connection portion 223 of the second groundterminal G2. In the illustrated embodiment of the present disclosure,the third ribs 2431 and the fourth ribs 2432 are formed by stamping thesecond main body portion 241. The third ribs 2431 and the fourth ribs2432 protrude toward the first metal shield 23. The third ribs 2431 andthe fourth ribs 2432 are discontinuously disposed along the extendingdirection of the connection portion 223 of the first ground terminal G1and the extending direction of the connection portion 223 of the secondground terminal G2, respectively, so as to achieve multi-positioncontact. As a result, the reliability of the contact between the secondmetal shield 24 and the first ground terminals G1 and the second groundterminals G2 is improved. In the illustrated embodiment of the presentdisclosure, a wall thickness of the third rib 2431, a wall thickness ofthe fourth rib 2432 and a wall thickness of a portion of the second mainbody portion 241 located between the third rib 2431 and the fourth rib2432 are the same. In an embodiment of the present disclosure, solderingis performed on the surfaces of the ribs 233 and the ribs 243 to solderthe ribs 233 and the ribs 243 to the first ground terminals G1 and thesecond ground terminals G2. For example, soldering is performed on thesurfaces of the first ribs 2331, the second ribs 2332, the third ribs2431 and the fourth ribs 2432 in order to solder the first ribs 2331,the second ribs 2332, the third ribs 2431 and the fourth rib 2432 to thefirst ground terminals G1 and the second ground terminals G2. Thesoldering method is at least one of spot soldering, laser soldering andultrasonic soldering.

The second extension portion 242 includes a plurality of third bulges2421 protruding toward the contact portions 221 of the first groundterminals G1, a plurality of fourth bulges 2422 protruding toward thecontact portions 221 of the second ground terminals G2, and a pluralityof second elastic pieces 2423 each of which is located between adjacentthird bulge 2421 and fourth bulge 2422. The second elastic pieces 2423extend along directions toward the second main body portion 241. Eachsecond elastic piece 2423 has an arc-shaped contact portion 2424. In theillustrated embodiment of the present disclosure, the second extensionportion 242 further includes two second protruding tabs 2425 located atopposite sides of each second elastic piece 2423. The second protrudingtabs 2425 and the second elastic pieces 2423 extend along oppositedirections. The second protruding tabs 2425 protrude sidewardly tocontact the adjacent wafer 2 so as to improve the shielding effect. Inthe illustrated embodiment of the present disclosure, a wall thicknessof the third bulge 2421, a wall thickness of the fourth bulge 2422, anda wall thickness of a portion of the second extension portion 242located between the third bulge 2421 and the fourth bulge 2422 are thesame.

In addition, the second main body portion 241 further includes aplurality of second protruding pieces 2412 extending downwardly from abottom edge thereof, and a plurality of connecting pieces 2413 each ofwhich is located between two adjacent second protruding pieces 2412. Byproviding the second protruding pieces 2412, the shielding length can beextended, and the shielding effect on the signal terminals S1 can beimproved. In the illustrated embodiment of the present disclosure, theconnecting pieces 2413 are stamped from the second main body portion241, and the connecting piece 2413 straddles the corresponding slot 2231so as to connect the other side of the first end portion 2232 and thesecond end portion 2233 of the same first ground terminal G1 so as toimprove the shielding effect. At the same time, the connecting piece2413 can also connect the other side of the first end portion 2232 andthe second end portion 2233 of the same second ground terminal G2 so asto improve the shielding effect.

Referring to FIGS. 12 and 14, in the illustrated embodiment of thepresent disclosure, the contact portion 221 and the connection portion223 of the first ground terminal G1 have a first wide surface 221 a anda first narrow surface 221 b perpendicular to the first wide surface 221a. The contact portion 221 and the connection portion 223 of the secondground terminal G2 have a second wide surface 221 c and a second narrowsurface 221 d perpendicular to the second wide surface 221 c. Theconnection portions 223 of each pair of differential signal terminalsare located between the first narrow surface 221 b of the first groundterminal G1 and the second narrow surface 221 d of the second groundterminal G2 which are located on opposite sides of the connectionportions 223 of each pair of differential signal terminals. The contactportions 221 of each pair of differential signal terminals are locatedbetween the first wide surface 221 a of the first ground terminal G1 andthe second wide surface 221 c of the second ground terminal G2 which arelocated on opposite sides of the contact portions 221 of each pair ofdifferential signal terminals. In the illustrated embodiment of thepresent disclosure, a width of the first wide surface 221 a and a widthof the second wide surface 221 c are greater than a width of eachcontact portion 221 of the signal terminals S1, thereby better shieldingcan be provided for the contact portions 221 of the signal terminals S1.

Referring to FIGS. 11 and 12, along a length of the connection portion223 of the conductive terminal 22, the first rib 2331 of the first metalshield 23 and the third rib 2431 of the second metal shield 24respectively contact two opposite sides of the connection portion 223 ofthe first ground terminal G1, and the second rib 2332 of the first metalshield 23 and the fourth rib 2432 of the second metal shield 24respectively contact two opposite sides of the connection portion 223 ofthe second ground terminal G2, thereby forming a shielding cavity 26surrounding the outer periphery of the connection portions 223 of eachpair of differential signal terminals. In the illustrated embodiment ofthe present disclosure, the first rib 2331 and the third rib 2431respectively contact the first wide surface 221 a of the connectionportion 223 of the first ground terminal G1. The second rib 2332 and thefourth rib 2432 respectively contact the second wide surface 221 c ofthe connection portion 223 of the second ground terminal G2. In theillustrated embodiment of the present disclosure, the shielding cavity26 is jointly formed by the first main body portion 231, the second mainbody portion 241, the first ground terminal G1 and the second groundterminal G2. The connection portion 223 of the first ground terminal G1includes a first tab portion 2234 protruding into the shielding cavity26. The connection portion 223 of the second ground terminal G2 includesa second tab portion 2235 protruding into the shielding cavity 26. Theconnection portions 223 of the differential signal terminals are locatedbetween the first tab portion 2234 and the second tab portion 2235. Inthe illustrated embodiment of the present disclosure, there are aplurality of the shielding cavities 26 which are disposed along anarrangement direction of each group of the conductive terminals 22. Twoadjacent shielding cavities 26 share a single first ground terminal G1or a single second ground terminal G2. In addition, a part of the sharedfirst ground terminal G1 protrudes into one shielding cavity 26, andanother part of the shared first ground terminal G1 protrudes intoanother shielding cavity 26.

Referring to FIG. 14, in the length of the contact portion 221 of theconductive terminal 22, the first bulge 2321 of the first metal shield23 and the third bulge 2421 of the second metal shield 24 respectivelycontact two opposite side surfaces of the contact portion 221 of thefirst ground terminal G1, and the second bulge 2322 of the first metalshield 23 and the fourth bulge 2422 of the second metal shield 24respectively contact two opposite side surfaces of the contact portion221 of the second ground terminal G2. In the illustrated embodiment ofthe present disclosure, the first bulge 2321 of the first metal shield23 and the third bulge 2421 of the second metal shield 24 respectivelycontact the first narrow surfaces 221 b of the contact portion 221 ofthe first ground terminal G1. The second bulge 2322 of the first metalshield 23 and the fourth bulge 2422 of the second metal shield 24respectively contact the second narrow surfaces 221 d of the contactportion 221 of the second ground terminal G2. The first extensionportion 232, the second extension portion 242, the first ground terminalG1 and the second ground terminal G2 jointly form a shielding space 27for accommodating the corresponding contact portions 221 of thedifferential signal terminals. The first elastic piece 2323 and thesecond elastic piece 2423 extend into the shielding space 27. In theillustrated embodiment of the present disclosure, there are multipleshielding spaces 27 which are disposed along a stacking direction ofeach group of the conductive terminals 22. Two adjacent shielding spaces27 share a single first ground terminal G1 or a single second groundterminal G2. One first wide surface 221 a of the contact portion 221 ofthe shared first ground terminal G1 is exposed to the shielding space27, and the other first wide surface 221 a of the contact portion 221 ofthe shared first ground terminal G1 is exposed to an adjacent shieldingspace 27. Similarly, a first wide surface 221 c of the contact portion221 of the shared second ground terminal G2 is exposed to the adjacentshielding space 27, and the other wide surface 221 c of the contactportion 221 of the shared second ground terminal G2 is exposed toanother adjacent shielding space 27.

In the illustrated embodiment of the present disclosure, there aremultiple wafers 2 of the first backplane connector 100, and the terminalarrangement of two adjacent wafers 2 are staggered. Correspondingly, theshielding cavities 26 at the same position of two adjacent wafers 2 arestaggered (referring to FIG. 13), and the shielding spaces 27 at thesame position of two adjacent wafers 2 are staggered (referring to FIG.15).

Referring to FIGS. 15 and 16, in the illustrated embodiment of thepresent disclosure, the spacer 3 is made of metal material or insulatingmaterial. The spacer 3 includes a body portion 31 and a protruding piece32 extending from the body portion 31. The body portion 31 includes aplurality of slots 311 corresponding to the first protrusions 2111. Theprotruding piece 32 includes a plurality of slits 321 corresponding tothe second protrusions 2112, so that the protruding piece 32 is roughlycomb-shaped. Each slot 311 is a closed slot, which means thecircumference of the slot 311 is surrounded by the body portion 31. Eachslit 321 is a non-closed slit, which means one end of the slit 321 isopened. The slit 321 is in alignment with the corresponding slot 321along the vertical direction. Each slot 311 includes a first slot 3111and a second slot 3112 which has a width larger than that of the firstslot 3111. The first slot 3111 is located above the second slot 3112 andcommunicates with the corresponding second slot 3112. The slit 321 islocated below the corresponding second slot 3112.

When assembling the spacer 3 to the plurality of wafers 2, firstly, thesecond slots 3112 of the spacer 3 are corresponding to the firstprotrusions 2111 along the extending direction of the contact portions221, and make the first protrusions 2111 pass through the second slots3112. Then, the spacer 3 is moved downwardly along the extendingdirection of the tail portions 222, so that the first constrictionportions 2113 are tightly clamped in the corresponding first slots 3111,thereby the wafers 2 can be combined as a whole. This can preventlooseness and prevent the wafers 2 from being separated from the spacer3 along the extending direction of the contact portions 221. At the sametime, the second constriction portions 2114 of the second protrusions2112 are tightly clamped in the slits 321 so to achieve double fixationand improve reliability.

Referring to FIG. 3, the second backplane connector 200 includes aheader 5, a plurality of wafers 6 assembled to the header 5, a spacer 7holding on one side of the plurality of wafers 6, and a mounting block 8holding the other side of the plurality of wafers 6.

Referring to FIGS. 19 and 23, each wafer 6 includes an insulating frame61, a plurality of conductive terminals 62 insert-molded with theinsulating frame 61, a first metal shield 63 fixed on one side of theinsulating frame 61, and a second metal shield 64 fixed on the otherside of the insulating frame 61.

Referring to FIG. 26, the insulating frame 61 is roughly frame-shaped.The insulating frame 61 includes a rear wall 611, a front wall 612opposite to the rear wall 611, a top wall 613 connecting one end of therear wall 611 and one end of the front wall 612, a bottom wall 614connecting the other end of the rear wall 611 and the other end of thefront wall 612, and a plurality of connecting walls 615. The connectingwalls 615 can enhance the structural strength of the frame. The rearwall 611 includes a first protrusion 6111. The first protrusion 6111includes a first constriction portion 6113. In the illustratedembodiment of the present disclosure, the insulating frame 61 includes ahollow portion 610. The connecting walls 615 include a first connectingwall 6151 connecting the top wall 613 and the bottom wall 614, and asecond connecting wall 6152 connecting the rear wall 611 and the bottomwall 614. The first connecting wall 6151 and the second connecting wall6152 are exposed in the hollow portion 610.

Referring to FIG. 19, the front wall 612 includes a plurality ofprotruding blocks 6121 disposed at intervals and a groove 6122 locatedbetween two adjacent protruding blocks 6121. The protruding block 6121includes an opening 6123 to partially expose corresponding conductiveterminal 62 in order to adjust the impedance.

The insulating frame 61 further includes a plurality of posts 616 forfixing and positioning the first metal shield 63 and the second metalshield 64. In the illustrated embodiment of the present disclosure, theposts 616 are disposed on the bottom wall 614, the first connecting wall6151 and the second connecting wall 6152. The first metal shield 63 andthe second metal shield 64 are located on two sides of the insulatingframe 61, respectively. The posts 616 include a plurality of first posts6161 and a plurality of second posts 6162. The first posts 6161 and thesecond posts 6162 are located on opposite sides of the insulating frame61 so to be fixed to the first metal shield 63 and the second metalshield 64, respectively.

Each conductive terminals 62 includes a contact portion 621, tailportion 622, and a connection portion 623 connecting the contact portion621 and the tail portion 622. Some of the contact portions 621 are usedto electrically connect with the first backplane connector 100. The tailportions 622 are used to be mounted to the second circuit board 302. Inthe illustrated embodiment of the present disclosure, the contactportion 621 is substantially perpendicular to the tail portion 622. Theconnection portion 623 is of a curved configuration.

Each group of conductive terminals 62 include a plurality of firstground terminals G1, a plurality of second ground terminals G2, and aplurality of signal terminals S1. In the illustrated embodiment of thepresent disclosure, two adjacent signal terminals S1 form a pair ofdifferential signal terminals. Each pair of differential signalterminals are located between one first ground terminal G1 and onesecond ground terminal G2. That is, each group of conductive terminals62 are disposed in a manner of G1-S1-S1-G2, which is beneficial toimprove the quality of signal transmission. The differential signalterminals are narrow-side coupling or wide-side coupling. A width of thefirst ground terminal G1 and a width of the second ground terminal G2are greater than a width of each signal terminal S1 therebetween, whichis beneficial to increase the shielding area and improve the shieldingeffect.

In the illustrated embodiment of the present disclosure, the connectionportions 623 of the conductive terminals 62 are partially insert-moldedwith the insulating frame 61. The connection portion 623 of the signalterminal S1 includes a narrowed portion 6230 insert-molded with theinsulating frame 61 for adjusting the impedance of the signal terminalS1 in order to achieve impedance matching. Referring to FIG. 21, in theillustrated embodiment of the present disclosure, each contact portion621 of the signal terminal S1 has a two-half structure, which includes afirst contact section 6211, a second contact section 6212, and a slot6210 located between the first contact section 6211 and the secondcontact section 6212. When the needle-shaped contact portion 221 of thesignal terminal S1 of the first backplane connector 100 is insertedbetween the first contact section 6211 and the second contact section6212, the first contact section 6211 and the second contact section 6212can be elastically deformed in order to improve the contact reliability.The first contact section 6211 includes a first arc-shaped surface, andthe second contact section 6212 includes a second arc-shaped surface.The first arc-shaped surface and the second arc-shaped surface aredisposed opposite to each other so as to jointly form a mating hole 6215for receiving the contact portion 221 of the signal terminal S1 of thefirst backplane connector 100. The two signal terminals S1 constitutinga pair of differential signal terminals, their connection portions 623are disposed in a first direction (for example, a vertical direction),and their contact portions 621 are disposed in a direction (for example,a left-right direction) perpendicular to the first direction.

Each contact portion 621 of the first ground terminal G1 and the secondground terminal G2 is substantially flat. The contact portion 621 of thefirst ground terminal G1, the contact portion 621 of the second groundterminal G2, and the connection portions 623 of the conductive terminals62 are all coplanar. As shown in FIG. 22, each connection portion 623 ofthe first ground terminal G1 and the second ground terminal G2 furtherincludes a slot 6231 adjacent to its corresponding the tail portion 622.The slot 6231 extends through a bottom edge of the connection portion623, so that the connection portion 623 is divided into a first endportion 6232 and a second end portion 6233. Each of the first endportion 6232 and the second end portion 6233 is connected with one tailportion 622. The contact portion 621 of the first ground terminal G1 andthe contact portion 621 of the second ground terminal G2 both extendinto the corresponding grooves 6122 to facilitate contact with the firstmetal shield 63 and the second metal shield 64. The contact portions 621of the signal terminals S1 extend beyond the protruding block 6121.

In the illustrated embodiment of the present disclosure, the contactportion 621 and the connection portion 623 of the first ground terminalG1 both include a first wide surface 621 a and a first narrow surface621 b perpendicular to the first wide surface 621 a. The contact portion621 and the connection portion 623 of the second ground terminal G2 bothinclude a second wide surface 621 c and a second narrow surface 621 dperpendicular to the second wide surface 621 c. The connection portions623 of each pair of differential signal terminals are located betweenthe first narrow surface 621 b of the first ground terminal G1 and thesecond narrow surface 621 d of the second ground terminal G2 which arelocated on opposite sides of the connection portions 623 of each pair ofdifferential signal terminals.

Referring to FIGS. 17, 18, and 20, each group of wafers 6 furtherincludes an insulating block 65 sleeved on the contact portions 621, anda metal shell 66 sleeved on the insulating block 65. Each insulatingblock 65 includes two through holes 651 into which the contact portions621 of the signal terminals S1 are inserted, and a mating surface 652 atan end thereof. In the illustrated embodiment of the present disclosure,the insulating block 65 is substantially cuboid shaped. Correspondingly,the metal shell 66 is substantially cuboid shaped. In an embodiment ofthe present disclosure, the insulating block 65 is fixed in the metalshell 66, for example, by assembling.

Referring to FIG. 20, the metal shell 66 includes a first side wall 661,a second side wall 662, a third side wall 663 and a fourth side wall664. The first side wall 661 is opposite to the third side wall 663. Thesecond side wall 662 is opposite to the fourth side wall 664. An area ofthe first side wall 661 and the third side wall 663 is larger than anarea of the second side wall 662 and the fourth side wall 664. The endsof the first side wall 661, the second side wall 662, the third sidewall 663 and the fourth side wall 664 all include a deflection portion665 which is bent inwardly. By providing the deflection portions 665, aconstricted portion can be formed at an end of the metal shell 66, sothat outer surfaces 6651 of the deflection portions 665 can guide thewafer 6 to be assembled to the header 5, and even guide the metal shell66 to be inserted into the shielding space 27 of the first backplaneconnector 100. In addition, in order to better restrict the insulatingblock 65, the second side wall 662 and the fourth side wall 664 furtherinclude restriction protrusions 6621, 6641 formed by stamping the secondside wall 662 and the fourth side wall 664 inwardly. The restrictionprotrusions 6621, 6641 are used to mate with the insulating block 65 soas to prevent the insulating block 65 from being drawn out of the metalshell 66.

In the illustrated embodiment of the present disclosure, the metal shell66 further includes a first extension piece 6611 extending from thefirst side wall 661 and a pair of first slots 6612 located on oppositesides of the first extension piece 6611. The metal shell 66 furtherincludes a second extension piece 6631 extending from the third sidewall 663 and a pair of second slots 6632 located on opposite sides ofthe second extension piece 6631. The first extension piece 6611 is invertical contact with the contact portion 621 of the first groundterminal G1 so as to improve the shielding effect. The second extensionpiece 6631 is in vertical contact with the contact portion 621 of thesecond ground terminal G2 so as to improve the shielding effect. In theillustrated embodiment of the present disclosure, the first extensionpiece 6611 and the second extension piece 6631 are deflected outwardlyand then extend, so that a distance between the first extension piece6611 and the second extension piece 6631 on the same metal shell 66 isgreater than a distance between the first side wall 661 and the thirdside wall 663. Referring to FIG. 21, for a group of conductive terminals62 arranged in the manner of G1-S1-S1-G2, the contact portion 621 of thefirst ground terminal G1 includes a first notch 6216 adjacent to thedifferential signal terminals. The first notch 6216 is used forreceiving the first extension piece 6611. The contact portion 621 of thesecond ground terminal G2 includes a second notch 6217 adjacent to thedifferential signal terminals. The second notch 6217 is used forreceiving the second extension piece 6631. In the illustrated embodimentof the present disclosure, taking two adjacent pairs of differentialsignal terminals sharing one second ground terminal G2 as an example,two sides of the second ground terminal G2 respectively include secondnotches 6217 facing different differential signal terminals, and thesecond notches 6217 are used for mating with two adjacent metal shells66.

In the illustrated embodiment of the present disclosure, the first metalshield 63 and the second metal shield 64 are symmetrically disposed onboth sides of the insulating frame 61. Referring to FIG. 24, the firstmetal shield 63 includes a first main body portion 631, a firstextension portion 632 extending from the first main body portion 631,and a first elastic arm 634 and a second elastic arm 635 which arerespectively located on two sides of the first extension portion 632.The first elastic arm 634 and the second elastic arm 635 extend beyondthe first main body portion 631 to contact the first ground terminal G1and the second ground terminal G2, respectively. The first main bodyportion 631 is located on one side of the connection portion 623 of theconductive terminal 62. In the illustrated embodiment of the presentdisclosure, the first extension portion 632 and the first main bodyportion 631 are located in different planes, in which the firstextension portion 632 is farther away from the second metal shield 64than the first main body portion 631. The first main body portion 631includes a plurality of first mounting holes 6311 for mating with theplurality of first posts 6161. The first posts 6161 are fixed to thefirst mounting holes 6311 by soldering. The first main body portion 631includes a plurality of ribs 633. The ribs 633 include a plurality offirst ribs 6331 protruding toward the first ground terminal G1 and aplurality of second ribs 6332 protruding toward the second groundterminal G2. The first ribs 6331 are disposed along an extendingdirection of the connection portion 623 of the first ground terminal G1.The second ribs 6332 are disposed along an extending direction of theconnection portion 623 of the second ground terminal G2. In theillustrated embodiment of the present disclosure, the first ribs 6331and the second ribs 6332 are formed by stamping the first main bodyportion 631. The first ribs 6331 and the second ribs 6332 protrudetoward the second metal shield 64. The first ribs 6331 and the secondribs 6332 are disposed discontinuously along the extending direction ofthe connection portion 623 of the first ground terminal G1 and theextending direction of the connection portion 623 of the second groundterminal G2, respectively, so as to achieve multi-position contact.Therefore, the reliability of the contact between the first metal shield63 and the first ground terminals G1 and the second ground terminals G2is improved. In the illustrated embodiment of the present disclosure, awall thickness of the first rib 6331, a wall thickness of the second rib6332, and a wall thickness of a portion of the first main body portion631 located between the first rib 6331 and the second rib 6332 are thesame.

In addition, the first main body portion 631 further includes aplurality of first protruding pieces 6312 extending downwardly from abottom edge thereof and a plurality of connecting pieces 6313 each ofwhich is located between two adjacent first protruding pieces 6312. Byproviding the first protruding pieces 6312, the shielding length can beextended, and the shielding effect on the signal terminals S1 can beimproved. In the illustrated embodiment of the present disclosure, theconnecting pieces 6313 are stamped from the first main body portion 631.The connecting piece 6313 straddles the corresponding slot 6231 toconnect one side of the first end portion 6232 and the second endportion 6233 of the same first ground terminal G1, thereby improving theshielding effect. At the same time, the connecting piece 6313 can alsoconnect one side of the first end portion 6232 and the second endportion 6233 of the same second ground terminal G2, thereby improvingthe shielding effect.

In the illustrated embodiment of the present disclosure, there aremultiple first extension portions 632 which are disposed at intervals.The third extensions 632 are used to be inserted into the first slots6612 and the second slots 6632 of the metal shell 66 to achieve contactand improve the shielding effect.

Similarly, referring to FIG. 25, the second metal shield 64 includes asecond main body portion 641, a second extension portion 642 extendingfrom the second main body portion 641, and a third elastic arm 644 and afourth elastic arm 645 which are respectively located on both sides ofthe second extension portion 642. The third elastic arm 644 and thefourth elastic arm 645 extend beyond the second main body portion 641 tocontact the first ground terminal G1 and the second ground terminal G2,respectively. The second main body portion 641 is located on the otherside of the connection portion 623 of the conductive terminal 62. In theillustrated embodiment of the present disclosure, the second extensionportion 642 and the second main body portion 641 are located indifferent planes, in which the second extension portion 642 is fartheraway from the first metal shield 63 than the second main body portion641. The second main body portion 641 includes a plurality of secondmounting holes 6411 for mating with the plurality of second posts 6162.The second posts 6162 are fixed and positioned in the second mountingholes 6411 by soldering. The second main body portion 641 includes aplurality of ribs 643. The ribs 643 include a plurality of third ribs6431 protruding toward the first ground terminal G1 and a plurality offourth ribs 6432 protruding toward the second ground terminal G2. Thethird ribs 6431 are disposed along the extending direction of theconnection portion 623 of the first ground terminal G1. The fourth ribs6432 are disposed along the extending direction of the connectionportion 623 of the second ground terminal G2. In the illustratedembodiment of the present disclosure, the third ribs 6431 and the fourthribs 6432 are formed by stamping the second main body portion 641. Thethird ribs 6431 and the fourth ribs 6432 protrude toward the first metalshield 63. The third ribs 6431 and the fourth ribs 6432 are disposeddiscontinuously along the extending direction of the connection portion623 of the first ground terminal G1 and the extending direction of theconnection portion 623 of the second ground terminal G2, respectively,so as to achieve multi-position contact. Therefore, the contactreliability between the second metal shield 64 and the first groundterminals G1 and the second ground terminals G2 is improved. In theillustrated embodiment of the present disclosure, a wall thickness ofthe third rib 6431, a wall thickness of the fourth rib 6432, and a wallthickness of a portion of the second main body portion 641 locatedbetween the third rib 6431 and the fourth rib 6432 are the same. In anembodiment of the present disclosure, soldering is performed on thesurfaces of the ribs 633 and the ribs 643 to solder the ribs 633 and theribs 643 to the first ground terminals G1 and the second groundterminals G2. For example, soldering is performed on the surfaces of thefirst ribs 6331, the second ribs 6332, the third ribs 6431 and thefourth ribs 6432 so that the first ribs 6331, the second ribs 6332, thethird ribs 6431 and the fourth ribs 6432 are soldered to the firstground terminals G1 and the second ground terminals G2. The solderingmethod is at least one of spot soldering, laser soldering and ultrasonicsoldering.

In addition, the second main body portion 641 further includes aplurality of second protruding pieces 6412 extending downwardly from abottom edge thereof, and a plurality of connecting pieces 6413 each ofwhich is located between two adjacent second protruding pieces 6412. Byproviding the second protruding pieces 6412, the shielding length can beextended, and the shielding effect on the signal terminals S1 can beimproved. In the illustrated embodiment of the present disclosure, theconnecting pieces 6413 is stamped from the second main body portion 641.The connecting piece 6413 straddles the corresponding slot 6231 toconnect the first end 6232 and the other side of the second end 6233 ofthe same first ground terminal G1 so as to improve the shielding effect.At the same time, the connecting piece 6413 can also connect the firstend portion 6232 and the other side of the second end portion 6233 ofthe same second ground terminal G2 so as to improve the shieldingeffect.

In the illustrated embodiment of the present disclosure, there aremultiple second extension portions 642 which are disposed at intervals.The fourth extensions 642 are used to be inserted into the first slots6612 and the second slots 6632 of the metal shell 66 so as to achievecontact and improve the shielding effect.

Referring to FIGS. 27 and 28, in the length of the connection portion623 of the conductive terminal 62, the first rib 6331 of the first metalshield 63 and the third rib 6431 of the second metal shield 64 are incontact with two opposite side surfaces of the connection portion 623 ofthe first ground terminal G1, respectively. The second rib 6332 of thefirst metal shield 63 and the fourth rib 6432 of the second metal shield64 are in contact with two opposite side surfaces of the connectionportion 623 of the second ground terminal G2, respectively. As a result,a shielding cavity 67 surrounding the outer periphery of the connectionportion 623 of each pair of differential signal terminals is formed. Inthe illustrated embodiment of the present disclosure, the first rib 6331and the third rib 6431 contact the first wide surface 621 a of theconnection portion 623 of the first ground terminal G1, respectively.The second rib 6332 and the fourth rib 6432 contact the second widesurface 621 c of the connection portion 623 of the second groundterminal G2, respectively. In the illustrated embodiment of the presentdisclosure, the shielding cavity 67 is formed by the first main bodyportion 631, the second main body portion 641, the first ground terminalG1 and the second ground terminal G2. The connection portion 623 of thefirst ground terminal G1 includes a third tab portion 6234 extendinginto the shielding cavity 67. The connection portion 623 of the secondground terminal G2 includes a fourth tab portion 6235 extending into theshielding cavity 67. The connection portions 623 of the differentialsignal terminals are located between the third tab portion 6234 and thefourth tab portion 6235. In the illustrated embodiment of the presentdisclosure, there are a plurality of shielding cavities 67 which aredisposed along an arrangement direction of each group of the conductiveterminals 62. Two adjacent shielding cavities 67 share a single firstground terminal G1 or a single second ground terminal G2. Taking theshared first ground terminal G1 as an example, a part of the sharedfirst ground terminal G1 protrudes into one shielding cavity 67, andanother part of the shared first ground terminal G1 protrudes intoanother shielding cavity 67.

At a position adjacent to the contact portion 621 of the conductiveterminal 62, the first extension portion 632 and the second extensionportion 642 are both inserted into the first slot 6612 and the secondslot 6632 of the metal shell 66. The first extension piece 6611 and thesecond extension piece 6631 of the metal shell 66 are respectivelyinserted into the first notch 6216 of the first ground terminal G1 andthe second notch 6217 of the second ground terminal G2. At the sametime, the first elastic arm 634 of the first metal shield 63 and thethird elastic arm 644 of the second metal shield 64 clamp both sides ofthe contact portion 621 of the first ground terminal G1. The secondelastic arm 635 of the first metal shield 63 and the fourth elastic arm645 of the second metal shield 64 clamp both sides of the contactportion 621 of the second ground terminal G2. Specifically, the firstelastic arm 634 and the third elastic arm 644 clamp the first widesurface 621 a of the first ground terminal G1. The second elastic arm635 and the fourth elastic arm 645 clamp the second wide surface 621 cof the second ground terminal G2. With this arrangement, the first metalshield 63, the second metal shield 64, the metal shell 66, the firstground terminal G1, and the second ground terminal G2 are all connectedin series, thereby the shielding area is increased and the shieldingeffect is improved.

In the illustrated embodiment of the present disclosure, there aremultiple wafers 6 of the second backplane connector 200, and theterminal arrangement of two adjacent wafers 6 are staggered.Correspondingly, the shielding cavities 67 of two adjacent wafers 6 arealso staggered. When the wafer 6 is assembled to the header 5, the metalshell 66 of the wafer 6 passes through the corresponding terminalreceiving groove 511 so as to extend into the receiving space 535.

Referring to FIGS. 29 and 30, in the illustrated embodiment of thepresent disclosure, the spacer 7 is made of metal material or insulatingmaterial. The spacer 7 includes a body portion 71 and a protruding piece72 extending from the body portion 71. The body portion 71 includes aplurality of slots 711 corresponding to the first protrusions 6111. Theprotruding piece 72 includes a plurality of slits 721, so that theprotruding piece 72 is roughly comb-shaped. Each slot 711 is a closedslot, which means the circumference of the slot 711 is surrounded by thebody portion 71. The slit 721 is a non-closed slit, which means one endof the slit 721 is opened. The slit 721 is in alignment with thecorresponding slot 711 along the vertical direction. Each slot 711includes a first slot 7111 and a second slot 7112 of which a width isgreater than that of the first slot 7111. The first slot 7111 is locatedat one side of the second slot 7112 and communicates with thecorresponding second slot 7112. The slit 721 is located on the otherside of the second slot 7112.

When assembling the spacer 7 to the plurality of wafers 6, firstly, thesecond slots 7112 of the spacer 7 are corresponding to the firstprotrusions 6111 along the extending direction of the contact portion621, and make the first protrusions 6111 pass through the second slots7112. Then, the spacer 7 is moved along the extending direction of thetail portions 622, so that the first constriction portions 6113 aretightly clamped in the first slots 7111. As a result, all the wafers 6can be combined into a whole so as to prevent loosening and prevent thewafers 6 from being separated from the spacer 7 along the extendingdirection of the contact portions 621.

The above embodiments are only used to illustrate the present disclosureand not to limit the technical solutions described in the presentdisclosure. The understanding of this specification should be based onthose skilled in the art. Descriptions of directions, although they havebeen described in detail in the above-mentioned embodiments of thepresent disclosure, those skilled in the art should understand thatmodifications or equivalent substitutions can still be made to theapplication, and all technical solutions and improvements that do notdepart from the spirit and scope of the application should be covered bythe claims of the application.

What is claimed is:
 1. A backplane connector, comprising: a plurality ofwafers, each wafer comprising an insulating frame and a plurality ofconductive terminals fixed to the insulating frame; and a spacerassembling the plurality of wafers; wherein the insulating framecomprises a first protrusion; and wherein the spacer comprises a bodyportion, and the body portion defines a plurality of slots each of whichis adapted to fix corresponding first protrusion.
 2. The backplaneconnector according to claim 1, wherein the first protrusion comprises afirst constriction portion, each slot comprises a first slot and asecond slot with a width larger than the first slot, the first slot isin communication with the second slot, the second slot is adapted toallow the first protrusion to pass through, and the first constrictionportion is clamped in the first slot.
 3. The backplane connectoraccording to claim 2, wherein each insulating frame further comprises asecond protrusion separated from the first bump, the second protrusioncomprises a second constriction portion, the spacer comprises aprotruding piece extending from the body portion, the protruding piecedefines a plurality of slits in which the second constriction portionare clamped.
 4. The backplane connector according to claim 3, whereinthe first protrusion is in alignment with the second protrusion, and theslit is in alignment with the slot.
 5. The backplane connector accordingto claim 1, wherein the insulating frame is frame-shaped, and theinsulating frame comprises a front wall adjacent to the contact portionsof the conductive terminals, a bottom wall adjacent to the tail portionsof the conductive terminals, a rear wall opposite to the front wall, anda top wall opposite to the bottom wall; and wherein the first protrusionis provided on the rear wall.
 6. The backplane connector according toclaim 1, wherein each conductive terminal comprises a contact portion, atail portion and a connection portion connecting the contact portion andthe tail portion, the insulating frame is fixed with the connectionportions of the conductive terminals, and the contact portions and thetail portions extend beyond the insulating frame; wherein the backplaneconnector further comprises a first metal shield located on one side ofthe insulating frame and a second metal shield located on the other sideof the insulating frame; wherein the conductive terminals comprisedifferential signal terminals, a first ground terminal and a secondground terminal, and the differential signal terminals are locatedbetween the first ground terminal and the second ground terminal; andwherein the insulating frame comprises a hollow portion, the connectionportions of the differential signal terminals, the connection portion ofthe first ground terminal and the connection portion of the secondground terminal are coplanar and partially exposed to the hollowportion.
 7. The backplane connector according to claim 1, wherein thefirst metal shield comprises a first main body portion, the first mainbody portion comprises a first rib protruding toward the first groundterminal and a second rib protruding toward the second ground terminal;wherein the second metal shield comprises a second main body portion,the second main body portion comprises a third rib protruding toward thefirst ground terminal and a fourth rib protruding toward the secondground terminal; and wherein the first rib and the third rib are incontact with opposite side surfaces of the connection portion of thefirst ground terminal, respectively; the second rib and the fourth ribare in contact with opposite side surfaces of the connection portion ofthe second ground terminal, respectively; and the first main bodyportion, the second main body portion, the first ground terminal and thesecond ground terminal jointly form a shielding cavity enclosing theconnection portions of the differential signal terminals.
 8. Thebackplane connector according to claim 7, wherein the connection portionof the first ground terminal comprises a first tab portion protrudinginto the shielding cavity, the connection portion of the second groundterminal comprises a second tab portion protruding into the shieldingcavity, and the connection portions of the differential signal terminalsare located between the first tab portion and the second tab portion. 9.The backplane connector according to claim 7, wherein the first metalshield comprises a first extension portion located on one side of thecontact portions of the conductive terminals, the first extensionportion comprises a first bulge protruding toward the first groundterminal and a second bulge protruding toward the second groundterminal; wherein the second metal shield comprises a second extensionportion located on the other side of the contact portions of theconductive terminals, the second extension portion comprises a thirdbulge protruding toward the first ground terminal and a fourth bulgeprotruding toward the second ground terminal; and wherein the firstbulge and the third bulge are in contact with opposite side surfaces ofthe contact portion of the first ground terminal, respectively; thesecond bulge and the fourth bulge are in contact with opposite sidesurfaces of the contact portion of the second ground terminal,respectively; and the first extension portion, the second extensionportion, the first ground terminal and the second ground terminaljointly form a shielding space enclosing the contact portions of thedifferential signal terminals.
 10. The backplane connector according toclaim 7, wherein the wafer comprises an insulating block sleeved on thecontact portions of the differential signal terminals, and a metal shellsleeved on the insulating block; and wherein the metal shell is incontact with the first metal shield and the second metal shield.